<?php

namespace PHPExcel\Worksheet\Drawing;

/**
 * \PHPExcel\Worksheet_Drawing_Shadow
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category PHPExcel
 * @package \PHPExcel\Worksheet_Drawing
 * @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
 * @version ##VERSION##, ##DATE##
 */
class Shadow implements \PHPExcel\IComparable {
    /* Shadow alignment */
    const SHADOW_BOTTOM = 'b';
    const SHADOW_BOTTOM_LEFT = 'bl';
    const SHADOW_BOTTOM_RIGHT = 'br';
    const SHADOW_CENTER = 'ctr';
    const SHADOW_LEFT = 'l';
    const SHADOW_TOP = 't';
    const SHADOW_TOP_LEFT = 'tl';
    const SHADOW_TOP_RIGHT = 'tr';
    
    /**
     * Visible
     *
     * @var boolean
     */
    private $visible;
    
    /**
     * Blur radius
     *
     * Defaults to 6
     *
     * @var int
     */
    private $blurRadius;
    
    /**
     * Shadow distance
     *
     * Defaults to 2
     *
     * @var int
     */
    private $distance;
    
    /**
     * Shadow direction (in degrees)
     *
     * @var int
     */
    private $direction;
    
    /**
     * Shadow alignment
     *
     * @var int
     */
    private $alignment;
    
    /**
     * Color
     *
     * @var \PHPExcel\Style\Color
     */
    private $color;
    
    /**
     * Alpha
     *
     * @var int
     */
    private $alpha;
    
    /**
     * Create a new Shadow
     */
    public function __construct() {
        // Initialise values
        $this->visible = false;
        $this->blurRadius = 6;
        $this->distance = 2;
        $this->direction = 0;
        $this->alignment = self::SHADOW_BOTTOM_RIGHT;
        $this->color = new \PHPExcel\Style\Color(\PHPExcel\Style\Color::COLOR_BLACK);
        $this->alpha = 50;
    }
    
    /**
     * Get Visible
     *
     * @return boolean
     */
    public function getVisible() {
        return $this->visible;
    }
    
    /**
     * Set Visible
     *
     * @param boolean $pValue            
     * @return Shadow
     */
    public function setVisible($pValue = false) {
        $this->visible = $pValue;
        return $this;
    }
    
    /**
     * Get Blur radius
     *
     * @return int
     */
    public function getBlurRadius() {
        return $this->blurRadius;
    }
    
    /**
     * Set Blur radius
     *
     * @param int $pValue            
     * @return Shadow
     */
    public function setBlurRadius($pValue = 6) {
        $this->blurRadius = $pValue;
        return $this;
    }
    
    /**
     * Get Shadow distance
     *
     * @return int
     */
    public function getDistance() {
        return $this->distance;
    }
    
    /**
     * Set Shadow distance
     *
     * @param int $pValue            
     * @return Shadow
     */
    public function setDistance($pValue = 2) {
        $this->distance = $pValue;
        return $this;
    }
    
    /**
     * Get Shadow direction (in degrees)
     *
     * @return int
     */
    public function getDirection() {
        return $this->direction;
    }
    
    /**
     * Set Shadow direction (in degrees)
     *
     * @param int $pValue            
     * @return Shadow
     */
    public function setDirection($pValue = 0) {
        $this->direction = $pValue;
        return $this;
    }
    
    /**
     * Get Shadow alignment
     *
     * @return int
     */
    public function getAlignment() {
        return $this->alignment;
    }
    
    /**
     * Set Shadow alignment
     *
     * @param int $pValue            
     * @return Shadow
     */
    public function setAlignment($pValue = 0) {
        $this->alignment = $pValue;
        return $this;
    }
    
    /**
     * Get Color
     *
     * @return \PHPExcel\Style\Color
     */
    public function getColor() {
        return $this->color;
    }
    
    /**
     * Set Color
     *
     * @param \PHPExcel\Style_Color $pValue            
     * @throws \PHPExcel\Exception
     * @return Shadow
     */
    public function setColor(\PHPExcel\Style\Color $pValue = null) {
        $this->color = $pValue;
        return $this;
    }
    
    /**
     * Get Alpha
     *
     * @return int
     */
    public function getAlpha() {
        return $this->alpha;
    }
    
    /**
     * Set Alpha
     *
     * @param int $pValue            
     * @return Shadow
     */
    public function setAlpha($pValue = 0) {
        $this->alpha = $pValue;
        return $this;
    }
    
    /**
     * Get hash code
     *
     * @return string Hash code
     */
    public function getHashCode() {
        return md5(($this->visible ? 't' : 'f') . $this->blurRadius . $this->distance . $this->direction . $this->alignment . $this->color->getHashCode() . $this->alpha . __CLASS__);
    }
    
    /**
     * Implement PHP __clone to create a deep clone, not just a shallow copy.
     */
    public function __clone() {
        $vars = get_object_vars($this);
        foreach ( $vars as $key => $value ) {
            if (is_object($value)) {
                $this->$key = clone $value;
            } else {
                $this->$key = $value;
            }
        }
    }
}
